Dental Composition Rigid Backbone Flexible Spacer
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Solution Overview
Problem
Dental composite materials often suffer from brittleness, leading to cracks and fractures in dental fillings and temporary crowns and bridges, which necessitates frequent repairs or replacements, and existing solutions do not adequately address this issue for modern dental materials.
Innovation Solution
A dental composition comprising a compound with a rigid backbone unit and a flexible spacer unit, combined with a filler and initiator, which reduces brittleness by enhancing impact strength and E-modulus while maintaining high depth of cure and hydrophobicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high strength dental filling materials are used, then durability is improved, but brittleness increases causing cracks and fractures
Solution Approach 1:
The patent changes the chemical parameters of the dental composition by incorporating specific compounds with rigid backbone units and flexible spacer units (formulas I-III), adjusting the molecular structure to achieve optimal balance between strength and flexibility. The compound structure includes polymerizable endgroups connected via spacer units, where the rigid backbone provides strength while the flexible spacer reduces brittleness
Solution Approach 2:
The patent creates a composite dental material system combining compound (A) with specific filler (B) and initiator (C) components. This composite approach integrates multiple functional elements: the rigid-flexible compound structure for mechanical properties, filler for reinforcement, and initiator for curing, achieving synergistic effects that reduce brittleness while maintaining strength
2Adaptability or versatility
If temporary crown and bridge materials are used, then adaptability is improved, but brittleness increases leading to fracture
Solution Approach 1:
The patent modifies the physical-chemical parameters of temporary dental materials by incorporating compounds with controlled molecular architecture (rigid backbone with flexible spacer). This structural parameter change allows the material to maintain adaptability for temporary applications while reducing brittleness through the flexible spacer unit that absorbs stress
3Reliability
If reduced brittleness is achieved through flexible components, then impact strength is improved, but depth of cure may be compromised
Solution Approach 1:
The patent applies local quality by designing compound (A) with distinct functional regions: rigid backbone units (formulas I-III) that provide structural integrity and polymerizable endgroups that ensure proper curing. Different parts of the molecule serve different functions - the rigid backbone for strength, the flexible spacer for impact resistance, and the polymerizable endgroups for complete cure depth
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves reduced brittleness, improved impact strength, and sufficient depth of cure, making it suitable for dental applications by providing a unique combination of mechanical properties that minimize the risk of cracks and fractures.
Implementation Method 1
a) compound (A) characterized by a structure according to any of formulas (I), (II), or (III)... c) initiator (C)
Data Source
AI summary
The invention relates to a dental composition comprising a) compound (A) with the following features: only one backbone unit (U) with 6 to 20 carbon atoms, at least 6 carbon atoms thereof forming an aromatic or an aliphatic cyclic moiety, the remaining carbon atoms either being part of substituents pending from the cyclic moiety or being part of bridging groups to spacer units, wherein one or more of the remaining carbon atoms can be replaced by an oxygen atom, the backbone unit not comprising a bisphenol structure, one or two spacer unit(s) (S) being connected to the backbone unit (U) via an ether linkage, at least one spacer unit (S) comprising a - CH2 - CH2 - CH2 - CH2 - O - CH2 - CH (Q) - OG chain or a -CH2-CH(OG) -CH2-OM residue or a mixture of these two types of spacers within one spacer unit, with G comprising at least one group selected from acroyl, methacroyl, acetyl, benzoyl, and combinations thereof, M comprising at least one aryl group, Q comprising at least one group selected from hydrogen, methyl, phenyl, phenoxymethyl, and combinations thereof, b) filler (B) and c) initiator (C).